Name: _________________________________ Date: _______________
Homeostasis Online Scavenger
Hunt
Directions: Go to the following websites in order to fill
in the blanks.
●
http://www.biology4kids.com/files/systems_regulation.html
● http://www.kidsbiology.com/biology_basics/needs_living_things
/homeostasis7.php
http://encyclopedia.kids.net.au/page/ho/Homeostasis
Homeostasis is a big word that biologists use to indicate that an organism needs to keep
conditions inside of itself the 1. __________, even though conditions outside are always
2.______________. All of your body's systems work together to maintain homeostasis inside of
your body. Homeostasis is achieved by making sure the 3. ____________, pH (acidity), and
4._______________ levels (and many other factors) are set just right for your cells to survive.
Homeostasis levels are different for each species.
5.______________ ________________ is a process that happens when your systems need to
slow down or completely stop a process that is happening. When you eat, food travels into your
stomach, and digestion begins. You don't need your stomach working if you aren't eating.
Another example of negative feedback occurs when your 6. __________'s ________________
begins to rise and a negative feedback response works to counteract and stop the rise in
temperature. Sweating is a good example of negative feedback.
7. ______________ _______________ is the opposite of negative feedback that encourages a
physiological (body) process or amplifies the action of a system. Positive feedback is a cyclic
process that can continue to amplify your body's response to a stimulus until a negative
feedback response takes over.
All sorts of factors affect the suitability of our body fluids to sustain life; these include properties
like temperature, 8. ________________, acidity (carbon dioxide), and the concentrations of
nutrients and wastes (urea, glucose, various ions,oxygen). This control is achieved with various
organs in the body. For example: 9. __________________ ________________________
• The skeletal muscles can shiver to produce heat if the body temperature is too
low.
• Non-shivering thermogenesis involves the decomposition of fat to produce
heat.
• Sweating cools the body with the use of
evaporation.
Chemical
regulation
• The pancreas produces 10. _____________ _________ __________________ to control
blood- sugar concentration.
• The lungs take in oxygen and give off carbon
dioxide.
• The kidneys remove urea, and adjust the concentrations of water and a wide variety of
ions.